Also notice that with permanent flurry you will have 22 attacks per minute, only 20% of them proc windfury ( that is 4,5 procs, but 3s cooldown will reduce it even more ) and now, this means 613 extra damage per minute, or 10 more DPS. Stormstrike can rise a little, but due to cooldown it is not really possible to say how much. ( if used always after cooldown is gone ) it will proc Windfury average 1.2 times per minute - adding 2,72 more DPS.